(Circulation. 2002;105:15.)
© 2002 American Heart Association, Inc.
Clinical Investigation and Reports |
From the Department of Medicine II (C.E.-K., H.J.R., S.B., C.B., H.K., J.M.), the Department of Medical Statistics and Documentation (G.R., A.V.), and the Department of Clinical Chemistry (G.H.), Johannes Gutenberg University Mainz, Germany; and EUROIMMUN (W.S.), Lübeck, Germany.
Correspondence to Christine Espinola-Klein, MD, University Clinic Mainz, Department of Medicine II, Langenbeckstrasse 1, 55101 Mainz, Germany. E-mail espinola{at}mail.uni-mainz.de
Background Recent findings suggest a causative role of infections in the pathogenesis of atherosclerosis. In hypothesizing an association between infectious agents and the development of atherosclerosis, we would expect a correlation to the extent of atherosclerosis. Moreover, this effect could be multiplied by the number of pathogens to which an individual had been exposed.
Methods and Results In 572 patients, IgG or IgA antibodies to herpes simplex virus 1 and 2, cytomegalovirus, Epstein-Barr virus, Hemophilus influenzae, Chlamydia pneumoniae, Mycoplasma pneumoniae, and Helicobacter pylori were measured. The extent of atherosclerosis was determined by coronary angiography, carotid duplex sonography, and evaluation of the ankle-arm index. Elevated IgA antibodies against C pneumoniae (P<0.04) and IgG antibodies against H pylori (P<0.02), cytomegalovirus (P<0.05), and herpes simplex virus 2 (P<0.01) were associated with advanced atherosclerosis (
2 vascular regions), adjusted for age, sex, cardiovascular risk factors, and highly sensitive C-reactive protein. Infectious burden divided into 0 to 3, 4 to 5, and 6 to 8 seropositivities was significantly associated with advanced atherosclerosis, with an odds ratio (95% CI) of 1.8 (1.2 to 2.6) for 4 to 5 (P<0.01) and 2.5 (1.2 to 5.1) for 6 to 8 seropositivities (P<0.02) (adjusted). After a mean follow-up of 3.2 years, cardiovascular mortality rate was 7.0% in patients with advanced atherosclerosis and seropositive for 0 to 3 pathogens compared with 20.0% in those seropositive for 6 to 8 pathogens.
Conclusions Our results support the hypothesis that infectious agents are involved in the development of atherosclerosis. We showed a significant association between infectious burden and the extent of atherosclerosis. Moreover, the risk for future death was increased by the number of infectious pathogens, especially in patients with advanced atherosclerosis.
Key Words: infection atherosclerosis carotid arteries coronary disease peripheral vascular disease
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